/*
 * Copyright 2017 KG Soft
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.kgurgul.cpuinfo.utils

import androidx.lifecycle.MutableLiveData

/**
 * [MutableLiveData] with default value support.
 *
 * @author kgurgul
 */
class NonNullMutableLiveData<T>(defaultValue: T) : MutableLiveData<T>() {

    init {
        value = defaultValue
    }

    override fun getValue(): T {
        return super.getValue()!!
    }

    override fun setValue(value: T) {
        value ?: throw NullPointerException("Cannot set null value")
        super.setValue(value)
    }
}